Backhoe



July 7, 1964 J 5, PILCH 3,140,000

BACKHOE Filed March 7, 1963 3 Sheets-Sheet l 6 INVENTOR. g JOHN s. PILCHATTOPNEY J. S. PILCH July 7, 1964 BACKHOE 3 Sheets-Sheet 2 Filed March7, 1965 INVENTOR.

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J. S. PlLCH July 7, 1964 BACKHOE 3 Sheets-Sheet 3 Filed March 7, 1963INVENTOR.

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United States Patent 3,140,000 BACKHOE John S. Pitch, Ware MachineWorks, Inc., R0. Box 140, Ware, Mass. Filed Mar. 7, 1963, Ser. No.263,596 10 Claims. (Cl. 214-138) This invention relates to trenchers orbackhoes and has particular reference to a new and improved dipper stickconstruction for apparatus of the type set forth.

An object of the invention is to provide a new and improved device ofthe type set forth which is hydraulically actuated.

Another object of the invention is to provide a new and improved deviceof the type set forth wherein the hydraulic actuating means foradjusting the bucket supporting portion of the dipper stick relative toits support is inside of said bucket supporting portion, and is sopositioned inside the dipper stick or bucket support as to preventdamage during use of the apparatus.

Another object of the invention is to provide a new and improved deviceof the type set forth wherein the dipper stick or bucket support andsupport therefor have comating surfaces of such configuration as tomaintain a set position or relationship therebetween.

Another object is to provide a new and improved device of the type setforth which can be adapted for trenching or loading.

Another object is to provide a device of the type set forth wherein thebucket can be drawn or moved up close to the pivot connection betweenthe boom and dipper stick.

Another object is to provide a new and improved device of the type setforth wherein the pivot connections of the socket member to the boom andof the socket member to the hydraulic means are in the same plane.

Another object is to provide a new and improved device of the type setforth wherein the pivot connections of the bucket to the bucketsupporting stick and of the bucket linkage to the bucket supportingstick are in the same plane.

Another object is to provide a new and improved device of the type setforth wherein the pivot point of the bucket, the pivot point of the linkpivotally connected to the supporting stick and the bucket pivoting ram,and the pivot point for the cylinder for actuating the bucket are in thesame plane.

Other objects and advantages of the invention will be apparent from thefollowing description taken in connection with the accompanyingdrawings. It will be understood that changes may be made in the detailsof construction and arrangement of parts shown and described, as thepreferred form of the invention has been given by way of illustrationonly.

Referring to the drawings:

FIG. 1 is a side view of a tractor mounted apparatus embodying theinvention, but adapted for a trencher or backhoe;

FIG. 2 is a fragmentary side view of the form of apparatus shown in FIG.1;

FIG. 3 is a fragmentary side view of an apparatus constructed inaccordance with the invention, illustrating the socket member utilizedin the present invention;

FIG. 4 is an end view of the device shown in FIG. 3;

FIG. 5 is a fragmentary side view of an apparatus constructed inaccordance with the invention, illustrating the bucket supporting stickutilized in the presentinvention;

FIG. 6 is an end view of the device illustrated in FIG. 5; and

FIG. 7 is .a sectional view taken on line 7-7 of FIG. 1 looking in thedirection of the arrows and shows the details of construction of thedipper stick of the apparatus.

3,140,000 Patented July 7,, 1964 Referring more particularly to thedrawings, wherein similar reference characters designate correspondingparts throughout, the invention relates particularly to an apparatusadaptable for use in loading or as a trencher or backhoe which includesa boom carrying a bucket-carrying dipper stick or bucket support.

In this device, the apparatus is shown mounted on a tractor, thehydraulic system of which provides hydraulic power for the apparatus.The tractor shown is of the track type and includes the engine 10,tracks 11 and operators seat 12.

The boom 13 is pivotally connected at 14 to support 15 which, in turn,is pivotally connected at 16 to platform support 17 which is detachablyconnected to the tractor.

The boom 13 is adapted to be raised and lowered by hydraulic jack 21connected adjacent its opposite ends at 22 and 23 to boom 13 and support15, respectively.

Adjacent the free end of said boom 13 is pivotally connected the dipperstick 19, said dipper stick 19 being connected intermediate its ends tosaid boom 13.

Said dipper stick 19 comprises a socket member 19A pivotally connectedat 20 to the boom 13, said socket member 19A including a longitudinalsocket or slot 39 in its outer face and having an angular supportingportion or section 19B as is shown in FIG. 4 of the drawings. Hydraulicmeans 27 for pivoting said socket member 19A relative to the boom 13 ispivotally connected to said socket member 19A at 26; and the pivotconnections 20 and 26, respectively, of said socket member 19A to saidboom 13 and of said socket member 19A to said hydraulic means 27 are,preferably, parallel to each other and perpendicular to the vertical orsocket axis and in the same plane.

A slidable or telescopic bucket-supporting stick 24 is slidably mountedin mating relation with said socket member 19A in said socket or slot 39such that said socket member 19A and said bucket-supporting stick 24have comating angular coextensive portions. Said coextensive portionsserve to prevent turning movement of the bucketsupporting stick 24.

Said bucket-supporting stick 24 is pivotally connected at 32 to thebucket 25a, said connection being made adjacent the end of saidbucket-supporting stick 24 opposite the end thereof in the socket member19A. 'Said bucketsupporting stick 24, further, carries hydraulic means29, which hydraulic means 29 effect rotation of the bucket 25a relativeto said bucket-supporting stick 24.

Said hydraulic means 29 comprise the support 36, the

bucket-rotating cylinder 29a pivotally connected at 36a to said support36, and the ram .37 which is operatively connected to said cylinder 29a.Said ram 37 is pivotally connected at 38 to the link 35, which link35 ispivotally connected at 35a to the bucket 25a, .and to the second link31, which link 31 is pivotally connected at one end to thebucket-supporting stick 24 and at its opposite end to ram 37 or the link35. The pivot connections 31a and 32, respectively, of saidbucket-supporting stick 24 are, preferably, parallel to each other andperpendicular to the bucket supporting stick and in the same plane. Thepivot points 31a, 32 and 36a are located in the same plane.

The hydraulic jack 33 has its cylinder connected at 33A to socket member19A and its ram connected at 33B to bucket-supporting stick 24.Hydraulic jack 33is adapted to move said bucket-supporting stick 24axially in said "Said. slot 39 maybe extended to either one or both ofthe ends of said socket member 19A to allow assembly ofbucket-supporting stick and bucketrotating cylinder support.

The operation of the device is believed to be apparent from theforegoing description.

From the foregoing it will be seen that I have provided new and improvedmeans for accomplishing all of the objects and advantages of theinvention.

I claim:

1. In a device of the character described, a boom, a dipper stickpivotally connected intermediate its ends to said boom, said dipperstick comprising a socket member pivotally connected to said boom,hydraulic means pivotally connected to said socket member for pivotingsaid member relative to said boom, said socket member having an angularsupporting section, a slidable bucket supporting stick slidably mountedin said socket member, said socket member and bucket supporting stickhaving comating angular coextensive portions to prevent turning movementof said bucket supporting stick, said bucket supporting stick having abucket pivotally connected thereto adjacent the end opposite the end insaid socket member, hydraulic means carried by said bucket supportingstick to effect rotation of said bucket relative to said bucketsupporting stick, said hydraulic means comprising a support and acylinder pivotally connected to said support, a ram operativelyconnected to said cylinder, a link pivotally connected to said bucketand said ram adjacent its opposite ends, and a second link pivotallyconnected to said bucket supporting stick, said socket member having alongitudinal slot in one face thereof and a member closing said slotafter the assembly of said support for said bucket rotating cylinder.

2. In a device of the character described, a boom, a dipper stickpivotally connected intermediate its ends to said boom, said dipperstick comprising a socket member pivotally connected to said boom,hydraulic means pivotally connected to said socket member for pivotingsaid member relative to said boom, the pivot connections of said socketmember to said boom and of said socket member to said hydraulic meansbeing parallel to each other and perpendicular to the socket axis and inthe same plane, said socket member having an angular supporting section,a slidable bucket supporting stick slidably mounted in said socketmember, said socket member and bucket supporting stick having comatingangular coextensive portions to prevent turning movement of said bucketsupporting stick, said bucket supporting stick having a bucket pivotallyconnected thereto adjacent the end opposite the end in said socketmember, hydraulic means carried by said bucket supporting stick toeffect rotation of said bucket relative to said bucket supporting stick,said hydraulic means comprising a support and a cylinder pivotallyconnected to said support, a ram operatively connected to said cylinder,a link pivotally connected to said bucket and said ram adjacent itsopposite ends, and a second link pivotally connected to said bucketsupporting stick, said socket member having a longitudinal slot in oneface thereof and a member closing said slot after the assembly of saidsupport for said bucket rotating cylinder.

3. In a device of the character described, a boom, a dipper stickpivotally connected intermediate its ends to said boom, said dipperstick comprising a socket member pivotally connected to said boom,hydraulic means pivotally connected to said socket member for pivotingsaid member relative to said boom, said socket member having an angularsupporting section, a slidable bucket supporting stick slidably mountedin said socket member, said socket member and bucket supporting stickhaving comating angular coextensive portions to prevent turning movementof said bucket supporting stick, said bucket supporting stick having abucket pivotally connected thereto adjacent the end opposite the end insaid socket member, hydraulic means carried by said bucket supportingstick to effect rotation of said bucket relative to said bucketsupporting stick, said hydraulic means comprising a support and acylinder pivotally connected to said support, a ram operativelyconnected to said cylinder, a link pivotally connected to said bucketand said ram adjacent its opposite ends, and a second link pivotallyconnected to said bucket supporting stick, the pivot connections of saidsecond link to said bucket supporting stick and of said bucket to saidbucket supporting stick being parallel to each other and perpendicularto the bucket supporting stick and in the same plane, said socket memberhaving a longitudinal slot in one face thereof and a member closing saidslot after the assembly of said support for said bucket rotatingcylinder.

4. In a device of the character described, a boom, a dipper stickpivotally connected intermediate its ends to said boom, said dipperstick comprising a socket member pivotally connected to said boom,hydraulic means pivotally connected to said socket member for pivotingsaid member relative to said boom, the pivot connections of said socketmember to said boom and of said socket member to said hydraulic meansbeing parallel to each other and perpendicular to the vertical or socketaxis and in the same plane, said socket member having an angularsupporting section, a slidable bucket supporting stick slidably mountedin said socket member, said socket member and bucket supporting stickhaving comating angular coextensive portions to prevent turning movementof said bucket supporting stick, said bucket supporting stick having abucket pivotally connected thereto adjacent the end opposite the end insaid socket member, hydraulic means carried by said bucket supportingstick to effect rotation of said bucket relative to said bucketsupporting stick, said hydraulic means comprising a support and acylinder pivotally connected to said support, a ram operativelyconnected to said cylinder, a link pivotally connected to said bucketand said ram adjacent its opposite ends, and a second link pivotallyconnected to said bucket supporting stick, the pivot connections of saidsecond link to said bucket supporting stick and of said bucket to saidbucket supporting stick being parallel to each other and perpendicularto the bucket supporting stick and in the same plane, said socket memberhaving a longitudinal slot in one face thereof and a member closing saidslot after the assembly of said support for said bucket rotatingcylinder.

5. In a device of the character described, a boom, a dipper stickpivotally connected intermediate its ends to said boom, said dipperstick comprising a socket member pivotally connected to said boom,hydraulic means pivotally connected to said socket member for pivotingsaid member relative to said boom, said socket member having an angularsupporting section, a slidable bucket supporting stick slidably mountedin said socket member, said socket member and bucket supporting stickhaving comating angular coextensive portions to prevent turning movementof said bucket supporting stick, said bucket supporting stick having abucket pivotally connected thereto adjacent the end opposite the end insaid socket member, hydraulic means carried by said bucket supportingstick to effect rotation of said bucket relative to said bucketsupporting stick, said hydraulic means comprising a support and acylinder pivotally connected to said support, a ram operativelyconnected to said cylinder, a link pivotally connected to said bucketand said ram adjacent its opposite ends, and a second link pivotallyconnected to said bucket supporting stick, said socket member having alongitudinal slot in one face thereof and a member closing said slotafter the assembly of said support for said bucket rotating cylinder andthe pivot point of said bucket, the pivot point of the link pivotallyconnected to said bucket supporting stick and the bucket pivoting ram,and the pivot point for the cylinder for actuating the bucket being inthe same plane.

6. In a device of the character described, a boom, a dipper stickpivotally connected intermediate its ends to said boom, said dipperstick comprising a socket member pivotally connected to said boom,hydraulic means pivotally connected to said socket member for pivotingsaid member relative to said boom, said socket member having an angularsupporting section, a slidable bucket supporting stick slidably mountedin said socket member, said socket member and bucket supporting stickhaving comating angular coextensive portions to prevent turning movementof said bucket supporting stick, said bucket supporting stick having abucket pivotally connected thereto adjacent the end opposite the end insaid socket member, hydraulic means carried by said bucket supportingstick to effect rotation of said bucket relative to said bucketsupporting stick, said hydraulic means comprising a support and acylinder pivotally connected to said support, a ram operativelyconnected to said cylinder and to said bucket, said socket member havinga longitudinal slot in one face thereof, which longitudinal slot extendsto at least one of the ends of said socket member for allowing assemblyof said bucket supporting stick and said bucket rotating cylindersupport.

7. In a device of the character described, a boom, a dipper stickpivotally connected intermediate its ends to said boom, said dipperstick comprising a socket member pivotally connected to said boom,hydraulic means pivotally connected to said socket member for pivotingsaid member relative to said boom, the pivot connections of said socketmember to said boom and of said socket member to said hydraulic meansbeing parallel to each other and perpendicular to the vertical or socketaxis and in the same plane, said socket member having an angularsupporting section, a slidable bucket supporting stick slidably mountedin said socket member, said socket member and bucket supporting stickhaving comating angular coextensive portions to prevent turning movementof said bucket supporting stick, said bucket supporting stick having abucket pivotally connected thereto adjacent the end opposite the end insaid socket member, hydraulic means carried by said bucket supportingstick to effect rotation of said bucket relative to said bucketsupporting stick, said hydraulic means comprising a support and acylinder pivotally connected to said support, a ram operativelyconnected to said cylinder and to said bucket, said socket member havinga longitudinal slot in one face thereof, which longitudinal slot extendsto at least one of the ends of said socket member for allowing assemblyof said bucket supporting stick and said bucket rotating cylindersupport.

8. In a device of the character described, a boom, a dipper stickpivotally connected intermediate its ends to said boom, said dipperstick comprising a socket member pivotally connected to said boom,hydraulic means pivotally connected to said socket member for pivotingsaid member relative to said boom, said socket member having an angularsupporting section, a slidable bucket supporting stick slidably mountedin said socket member, said socket member and bucket supporting stickhaving comating angular coextensive portions to prevent turning movementof said bucket supporting stick, said bucket supporting stick having abucket pivotally connected thereto adjacent the end opposite the end insaid socket member, hydraulic means carried by said bucket supportingstick to eifect rotation of said bucket relative to said bucketsupporting stick, said hydraulic means comprising a support and acylinder pivotally connected to said support, a ram operativelyconnected to said cylinder and to said bucket, said socket member havinga longitudinal slot in one face thereof, which longitudinal slot extendsto at least one of the ends of said socket member for allowing assemblyof said bucket supporting stick and said bucket rotating cylindersupport.

9. In a device of the character described, a boom, a dipper stickpivotally connected intermediate its ends to said boom, said dipperstick comprising a socket member pivotally connected to said boom,hydraulic means pivotally connected to said socket member for pivotingsaid member relative to said boom, said socket member having an angularsupporting section, a slidable bucket supporting stick slidably mountedin said socket member, said socket member and bucket supporting stickhaving comating angular coextensive portions to prevent turning movementof said bucket supporting stick, said bucket supporting stick having abucket pivotally connected thereto adjacent the end opposite the end insaid socket member, hydraulic means carried by said bucket supportingstick to effect rotation of said bucket relative to said bucketsupporting stick, a link pivotally connected to said bucket and said ramadjacent its opposite ends, and a second link pivotally connected tosaid bucket supporting stick, said socket member having a longitudinalslot in one face thereof and a member closing said slot after theassembly of said support for said bucket rotating cylinder.

10. In a device of the character described, a boom, a dipper stickpivotally connected intermediate its ends to said boom, said dipperstick comprising a socket member pivotally connected to said boom,hydraulic means pivotally connected to said socket member for pivotingsaid member relative to said boom, said socket member having an angularsupporting section, a slidable bucket supporting stick slidably mountedin said socket member, said socket member and bucket supporting stickhaving comating angular coextensive portions to prevent turning movementof said bucket supporting stick, said bucket supporting stick having abucket pivotally connected thereto adjacent the end opposite the end insaid socket member, hydraulic means carried by said bucket supportingstick to effect rotation of said bucket relative to said bucketsupporting stick, said hydraulic means comprising a support and acylinder pivotally connected to said support, a ram operativelyconnected to said cylinder, a link pivotally connected to said bucketand said ram adjacent its opposite ends, and a second link pivotallyconnected to said bucket supporting stick, said socket member having alongitudinal slot in one face thereof.

References Cited in the file of this patent UNITED STATES PATENTS1,162,607 Hoar Nov. 30, 1915 2,411,498 Billings Nov. 26, 1946 2,461,978Hall Feb. 14, 1949 2,784,855 Acker Mar. 12, 1957

1. IN A DEVICE OF THE CHARACTER DESCRIBED, A BOOM, A DIPPER STICKPIVOTALLY CONNECTED INTERMEDIATE ITS ENDS TO SAID BOOM, SAID DIPPERSTICK COMPRISING A SOCKET MEMBER PIVOTALLY CONNECTED TO SAID BOOM,HYDRAULIC MEANS PIVOTALLY CONNECTED TO SAID SOCKET MEMBER FOR PIVOTINGSAID MEMBER RELATIVE TO SAID BOOM, SAID SOCKET MEMBER HAVING AN ANGULARSUPPORTING SECTION, A SLIDABLE BUCKET SUPPORTING STICK SLIDABLY MOUNTEDIN SAID SOCKET MEMBER, SAID SOCKET MEMBER AND BUCKET SUPPORTING STICKHAVING COMATING ANGULAR COEXTENSIVE PORTIONS TO PREVENT TURNING MOVEMENTOF SAID BUCKET SUPPORTING STICK, SAID BUCKET SUPPORTING STICK HAVING ABUCKET PIVOTALLY CONNECTED THERETO ADJACENT THE END OPPOSITE THE END INSAID SOCKET MEMBER, HYDRAULIC MEANS CARRIED BY SAID BUCKET SUPPORTINGSTICK TO EFFECT ROTATION OF SAID BUCKET RELATIVE TO SAID BUCKETSUPPORTING STICK, SAID HYDRAULIC MEANS COMPRISING A SUPPORT AND ACYLINDER PIVOTALLY CONNECTED TO SAID SUPPORT, A RAM OPERATIVELYCONNECTED TO SAID CYLINDER, A LINK PIVOTALLY CONNECTED TO SAID BUCKETAND SAID RAM ADJACENT ITS OPPOSITE ENDS, AND A SECOND LINK PIVOTALLYCONNECTED TO SAID BUCKET SUPPORTING STICK, SAID SOCKET MEMBER HAVING ALONGITUDINAL SLOT IN ONE FACE THEREOF AND A MEMBER CLOSING SAID SLOTAFTER THE ASSEMBLY OF SAID SUPPORT FOR SAID BUCKET ROTATING CYLINDER.